Milling-machine



c. H. SCHUHRANDE. 1. LEES.

'MILLNG MACHINE. APPLCAUONl FIL'ED MAY I?, 191.5.

Reima Nov. 2, 19,20. 14,976.,

3 SHEETSSHEET l.

C. H, SCHUHE AND E, J. LEES.

MILLING MACHINE!- APPLscANoN FILED MAY17,1916.

Reissnmi Nov. 2, ,1920,v

c. II. SCHUHE AND 5.1. LEES.

MILLING MACHINE. APPLICATION FILED MAY Iz. 191s.

rgimtl 'o. 1,178,270, dated .April 4, 1916, Serial No. 37,246, filed .Tune 3 Cleveland, in

CHARLES H. soHUmz. am)intrins'rI J. LEES, or CLEVELAND,

formes.

cmo, Assrenons To mit?.

LEES-BRADNER COMPANY, 0F CLEVELAND, GHIO,

MILLINGMACHINE.

Specification of Reissued Letters Patent.

Reissued Nov. 2, 195m. 0, 1915. Application for reissue led Hay 17, 1916. Serial No. 98,227.

To all whom 'it may concern.

Be it known that we, CHARLES H. SCHUH and lflnrnis'r J. LEES, both citizens of the United States of America, residing at the county of Cuyahoga and State of Ohio, have invented a new and useful Imprm'ement'in Milling-Machines, of which' the following is a specification, the principle ofthe invention `being herein ex- Kleinod and thefbest mode `.in which We ave contemplated applying that principle,

soas to distinguish it from other inventions. Our invention deals W-ith an improvement 4in millingnmchines' andl more particularly to the relative actuation and control of certain pai-ts thereof.

Heretofore, so far as our knowledgeextends', whenever a milling too'l had' 'con'- 4sis cluded'a given cut incident to the travel of its supporting carriage in predetermined harmoniousrelation to the rotation lof the' work spindle, it was required preparatory to a subsequent cutto reverse or release the interconnecting mechanism :necessitating a release of the operative tension or torque between the several co cting parts ot such mechanism. Tlnsjcircunistance entailed a `-`)ickinlfu a action of such )arts for each individual cut with consequent wear upon the parts, surprising Waste ot time and ire- The object of this invention is to factors of demerit in a feasible and at 'the same time simple manner. lveaccoinplish such object. according to the exemplilication of the (lrawin'gsby the employment, as one part of the interconnecting mechanism7` of a spline shaft along which an auxiliary slidewhich indirectly supports the tool can riage may be returned without` disturbing the established extension which the driving parts had to assume in the beginning.

yConcrete illustrations which indicatethe value of ou/ discovery may be helpful (a)- Owing to', the avoidance` of any save initial lost motion for any j .iarticularjob -the'relative rotation ofthe work spindle and lead Screw can be more reliably depended on.

(7))y @wing to -the possible distribution of theJ driving contact, over a .longer or full section ofthe lead screw instead of repeatedly over some specilic part thereof, ab-

provide lanarrangement which Will'avon'l the stated tudinal direction, that is, parallel describedv and illustrated in the accompany-- ingvdrawings, wherein is shown an embodin ment of the invention, but it is. to be understood that changes, variations and modifica-- tions can be resorted to which come Within the scope of the claimshereunto appended. Adverting to the drawings: Figure l is a top plan of a milling machineembodying our invention` Fig. Il is a section on line lll Il of Fig. l. Fig, lll is a section on a zig-zag line lll lll of Fig. Il. Fig. lV is a section of a common locking det-ail taken online'V IV of Fig. I. Fig. V is a bro lien front elevation oit certain aulviliarv actuating mechanism. y

inasmuch as comparatively few parts of the machine in its entirety have any direct wearing upon the invention, designation by reference numeral in the (ilrawings will be nrestricted to mention only of such as are e...-

'the tool carriage and longitudinally movable slide respectively. As has been earlier stated the drawings exemplify one feature of our-.invention a coacting' member capable of having,y independent movement imparted to it `and to this Wewili hereina'tter refer' as the ,auxiliary slide.

So, the term lead should be considered as vthat movement which is established in predetermined harmony with the rotation of the work. `The term traverse will be employed throughout to indicate relative movement of the Work andtool ina long-ito the mma axis of lle iroil spindles.-` rl by power 01' hand; but f Speed of rotation olf the iwi A bed l carries above the which effects the mtazion pininn E* :incl geilt P Tl Ork spindle, l in the 3i Y 1 il); up )aus .in cnnn'mnicaed from the A tln'cufgli' the usual chain of g fio an( l c1' shaft l() 'which in :icm

inicntion is of the spline l A mtte in turn rotates si piif i meshes with im idler 12 J i upon :1i conveniently locate; c bed .anal by this means 4 'pinion i3 locs@ upon the lcml sf'u nur-misil in any appro@ l nu mrtiz'xg longitudinal mm *in 'n liiifmontX/*Y with the rotnion ci Tfn@ Wnik. hach zi lnumcnimls cnnnecinn m inei'ilpendent actuation bewccn 'die if. tfml :it opposite ends of the machine is lionf'svcr to be -desnc cil/Lim, los

. cri-nld. lic rec@ ivm?. c iscvfl cic tlm n i v At *the sums tim t, l mfing 121i 1c sxcmplicuiicn the ma. our lerl screw i4 is purposely no; ncnfljf :mclmrefl to the bail, nilczl driving nl fili@ screw lthz'nngh the :igiencv rif' f, which is mit c v ed npfni flic Qnll o tlie icm? scew i", im?) also mlhave :i jaw clutch fm'imfc "i c pinion lf @jong the bed We nterpose a mixilia'fgf supporting slide v19 in. lle same general (l1- lm: mi' will ireiiefcnce liked by tighci n y of thc. we :l locke? lever 2W hcre'l'oi'e the il.

to which if, may be Ling vlo the bwl 'ihrsngh the known vlnr, p 2G having @wn in Figs. .l and IV'. xiliarjf slide 19 and not i c lied, l which directlysupports thel slide Hence, when ille mViliary slide 19 nmvcs the slide 15S nieves v. 1 l1. Then the liiuy slide is ighteneil to the bed il;r of -mwsc consii wxLes in eect 'a part thereof.

han on. 'the nthei hand iil is unlocked, a. lnnxgitmlinal t1' may be imparted 'there- 'n in ills following manner: lower hand urns a shaft 2? pinion 23v and gsm' iis latter engages the .l5-cd shown in Figs. the :nmiliary slide nd any une pinion l along viii without necessitating a reversal of thc driving; tension' either in such pinion or my @l 1- irmft 0'` cl'ianism for establ mrmcnio 'mnectlnn between "alla wfn'k in the land' w? H'. lt will now- "npiflly :fion by 'the mm inn' :1. cliffs?.- ringr lic n;. 5.x, evcrfnzilly 'im 'cimmed will mi!" 2HE lili' on, apslide movable upon said bed, mechato translate its'rotation into traverse of saidL nism including rotating parts connected with said spindleand adapted automatically Uslide substantially parallel tothe axis ot' said spindle, said mechanism including a pair ot members capable of relative movementalso substantially parallel to said spindle axis and distinct' from their cri-acting automatic movement, another spindle monted upon said-slide, means for feeding one spindle crosswise of the other andmeans for tightening said. members against such distinct relative movementduring their automatic' movement.

1l. In a milling machine, the combination ofa bed, a spindle. a carriage for said spindle, a slide mounted to traverse upon sach bed, means Vfor lockingr said slide to the bed, a slide supporting said (.'arriage and mounted to triivcrsr-'iipiin 4said lirst mentioned slide, vand a connection with the upper slide to effeet the forward traverse thereof` said connection including a pinion carried by said lower slide and also includingT a` spline shaft along which said pinion may slide and with which-said pinion. ma;y rotate, whereby to return traverse said lower slide without rc lease of, the driving tension in said connection.

l2. A ijnillingg,r machine including a spin die, a slide, rotating mechanism connected with said spindle and adapted to translate its rotation into longitudinal traverse ot said slide, and a device for cllecting the idle traverse of, said slide without;releasing the tension in the rotating mechanism or dis connecting said mechanism 'from said'slide.

'13. A milling machine comprising a work spindle. a tool spindle, a slide supporting` one of said spindlcs, and mechanism adapted to, translate thc'rotation ot' one spindle into a traverse ol theslide, said mechanism including a lead screw adapted to produci` a predetermined ratio ol` operative t'avcrsc motion of the. slide vwith rey. spect to the rotation ot thc spindle and also including a pair of members capable ol relatiifc movement distinct from that movement 'oli either which is coincident with the movenient of the lead screw whereby thc reverse tra verso ol` thc slide may lic vell'ccteilfivithout rotatingr thc lead sci-cw or cllectinglits voperativo disconnection,

Il. A\ iiiiiliiigg,f machiiii` including' a spin dlc. a slide. rotating mechanism, including a. lcad screw connected willi said spindle and ailaplcd lo translate thc i'oatioii oli-said, spindle iiito a longitudinal traverse 'movenient ot' said slide at a correlated rateo,F

I rotatably speed, and a device for eilectin the revers! traverse movement of said s 1de without either disconnection from, .or rotation of,

said lead screw.

15. A milling machine'comprismg ii. work spindle, a. tool spindle, a slide supporting one of said spindles, mechanism adapted to translate therotation ,of one spindle into a longitudinal ymovement of saidjslide, said mechanism includingilead vScreii' adapted tudinal movement of said slide .with'respect to the rotation of that `spindle which is not 'to .produce aA predete mined ratio of longisupported thereby, 'said mechanism also' Vinchilling` a pair of members `capable of relative movement without requiring theTotation of the lead screw. whereby the reverse longitudinal movement of the slide maybe acconiplished without reversingI the direction ot' rotation of said lead screw as a rotating pai-t of said mechanism. i v

1.6. In a milling machine, the combination of a work spindle, a tool spindle, a slide supporting one of said splndles, a h'arnionious 'connection including a lead screw' between said slide and the other of said spindles adapted automatically tt'itranslate the rotation of the latter into a predetermined ratio of for 'ard traverse of the slide, and 'a ldevice for effecting the reverse traverse ot' said slide without releasing the tensioiiinsaid connection.

l?. 1n a millingr machine, the combination ot a work spindle` a tool spindle, a slide `supporting` oneof said spindles,v rotating nicciiaihsin connecting sind slide and theothcro'r' said spindlesiandr ,adapted automatically to translate the rotation of the latter into a predetermined ratio of forward traverse of said slide, said mechanism includiugrl a pair of members capable of relative movement distinct .from Itheir coaction Vas partis of the automatic operation of-such mechanism, the arrangement bein r such as to enable the occurrence ,of sai distinct relative movement and the returntraverse of said slide without reversing. a rotatingY part of said mechanism.

18.. A-thread milling machine comprising Vthe combination of a bed, a slide mounted l'or i'ecipro'eation thereon. rotatable Work and tool milling, one-of saidA spindles being:

mounted upon said bed and the other upon said slide, and mechanism including rotating,r members and a vpair of "partsadapted tov havi` slidiiig-association for operative] con"- nectiiigl said"bed mounted Spindle and slide whereb)7 the rotation of the .former travels thc latter `in a forw"y for slidingr oiie oi*l said rparts aloii back ard directirin without hiss of the torsion established 'in' said rot-ating members d direction, and means f y f.' i'e-.latively' to the other whereby to travel saidrslide in a' avori-t Spinetta a tooi epinciie, a, slide supie ot Suid spinfilee, mechanism con- L seid stille and the other of said spindles and :nleptecl automatically to translate 'l the rotation of the 4letter into @predetermined ratio of i'orwar-:i traverse of Said Slide, Seid mechanism ineiuding a pan' ot memberscapable et relative movement dis- .tinet from their @onction es parte of the untonnitie operation of snail mechanism, 'whereby to traverse seid slide Without (iiseonneeting or reversing any part of said mechanism and means for aeeomplishing euch dist-inet movement.

. 2th The method of miliing threads which consiste in rotating egworlr piece, effecting e distinct relative movement in one direction 'between seid piece and e tooi in predetermined ratio to the rotation of said piece, and

eii'eeting a relative movement in the opposite direction Without release of the established torsion preparatory to reeutting.

2l. The method of milling threads which Consists in rotating the Work, automatically etfeeting ,a distinct relative Straight line n movement to Cause seid Work and e tool to approach each other :it a rate of speed in pre determined ratio to the speed of rotation of' said work, and effecting a relative separatim,r movement between said Work and tool without relaxation of the established torsion preparatory to recutting.

Signed by us this eighth day of May,P L91@ CHARLES H.' SCHUHE ERNEST J. LEES.v 

